symptom of Tourette syndrome

Echolalia (a compulsion to repeat words heard) and
palilalia (spontaneous repetition of one’s own words) are two distinctive symptoms of Tourette syndrome. Coprolalia, the compulsion to utter obscenities, may also be present. Other vocalizations that may occur include grunts, barks, hisses, whistles, and other meaningless sounds. Motor tics may be simple actions that are virtually unnoticeable....